68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "common/debug.h"
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#include "common/stream.h"
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#include "engines/private/savegame.h"
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namespace Private {
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static const uint32 kSavegameHeader = MKTAG('P','E','Y','E');
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void writeSavegameMetadata(Common::WriteStream *stream, const SavegameMetadata &meta) {
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stream->writeUint32BE(kSavegameHeader);
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stream->writeUint16LE(meta.version);
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stream->writeSByte(meta.language);
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stream->writeSByte(meta.platform);
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}
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bool readSavegameMetadata(Common::SeekableReadStream *stream, SavegameMetadata &meta) {
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byte buffer[8];
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stream->read(buffer, 8);
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if (stream->eos() || stream->err()) {
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return false;
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}
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uint32 header = READ_BE_UINT32(buffer);
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if (header != kSavegameHeader) {
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debug(1, "Save does not have metadata header");
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return false;
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}
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meta.version = READ_LE_UINT16(buffer + 4);
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if (meta.version < kMinimumSavegameVersion) {
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debug(1, "Save version %d lower than minimum %d", meta.version, kMinimumSavegameVersion);
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return false;
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}
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if (meta.version > kCurrentSavegameVersion) {
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debug(1, "Save version %d newer than current %d", meta.version, kCurrentSavegameVersion);
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return false;
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}
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meta.language = (Common::Language)buffer[6];
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meta.platform = (Common::Platform)buffer[7];
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return true;
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}
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} // End of namespace Private
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